The 007925F relay kit is specified for applications requiring a robust 24-volt alternating current coil to manage the mechanical switching of the pump’s electrical circuit

verify the specific wiring diagram of your 3100 series model for multi-component compatibility

the Robertshaw 10-660 is the direct performance equivalent for the Carrier/BDP HY660001 and is the standard fusible link repair kit for these applications

Industry-standard 24V control circuit compatibility for seamless integration with existing low-voltage wiring

Reduces maintenance frequency by keeping water circuits clear of corrosion and debris

Maxitrol 325-3BL-1/2 Regulator The 007925F relay kit isThe Maxitrol 325 3BL 1 2 is a professional grade certified line pressure gas regulator engineered for precision fuel management in high efficiency heating systems. Designed specifically for 2 PSI piping systems, this 1 2" NPT gas regulator utilizes a lever acting design to maintain a stable 7 11" WC outlet pressure regardless of fluctuations in the inlet supply. It is rated for a maximum inlet pressure of 2 PSI and features a positive dead end lock up